I honestly would love to see these used for both input into a machine by the user and for controled and regulated data input into the brain. IE, you need to learn math, just upload everything you need to know into your brain. No more fusing with long hours of doing stupid math problems.
Plus people in critical jobs like medics and stuff could pull data on people very quickly with just a thought. IE someone gets shot. The medic sees them, pulls info on who they are, medical history, etc with just a thought. Obviously someone will write a neural virus that'll royally fry someone's brain, but that's to be expected and totally planned for, or we're going to have a lot of corpses if people start using this a lot.